Effect of dust on an amplitude modulated electromagnetic beam in a plasma

Journal Article · Tue Apr 15 00:00:00 EDT 2008 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2904598· OSTI ID:21120274

Sharma, Suresh C ^[1]; Gahlot, Ajay ^[2]; Sharma, R P ^[3]

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1. Department of Physics, Maharaja Agrasen Institute of Technology, PSP Area Plot No.-1, Sector-22, Rohini, Delhi-110085 (India)
2. Maharaja Surajmal Institute of Technology, Janakpuri, New Delhi-110058 (India)
3. Center for Energy Studies, Indian Institute of Technology (IIT), Hauz Khas, New Delhi-110016 (India)

A large amplitude modulated Gaussian electromagnetic beam propagating in a dusty plasma has been studied. The electrons are heated nonuniformly by the beam. For the nonsteady state, we obtain nonlinear current density in the presence of dust grains. This expression has been used to study the nonstationary self-focusing and resulting self-distortion of the amplitude modulated electromagnetic beam. It has been observed that the effect of dust is drastic on the modulation index in comparison to dust free plasma. A simple scaling showing the dependence of modulation index on dust grain size and charge has been presented.

• OSTI ID: 21120274
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 15; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
BEAMS
COMPARATIVE EVALUATIONS
CURRENT DENSITY
DUSTS
ELECTROMAGNETIC RADIATION
ELECTRONS
FOCUSING
GRAIN SIZE
MODULATION
NONLINEAR PROBLEMS
PLASMA